It was once hailed as one of the best second serves in the women's game, but since the YEC last year I have noticed she is throwing in TONS of double faults. I'm not aware that she had any shoulder related injuries or surgeries (just know of the ankle surgery in the off season). I would have thought she would be so confident in the technique of this particular shot that it wouldn't really break down even if the rest of her game goes awry, but apparently not. Is it just lack of confidence? Or possibly somehow she is not getting as much spin on the ball as she used to?

__________________He looked deep into his eyes and said, "You're perfect."

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I think part of it was it was so hyped that opponents started working harder on returns to it. I remember seeing someone (can't remember who) practicing in Brisbane, their coach was serving them kickers and the player was bashing them back down the line.

When a player loses her confidence, the serve is usually one of the main victims. Look at Kvitova's serve, it's turned from a big weapon to a monumental liability that drags the rest of her game with it.